Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..173s&link_type=abstract
XMM-Newton Proposal ID #03054407
Physics
White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, V442 Oph, Lq Peg, Dw Uma, V794 Aql, Lx Ser, Kr Aur, Ln Uma, Xmm-Newton Proposal 03054407
Scientific paper
VY Scl stars are in two respects an extraordinary subgroup of Cataclysmic Variables. First, they are located just above the period gap, the most prominent feature of the orbital period distribution of CVs which indicates their exceptional evolutionary status. Secondly, VY Scl stars show long lasting low-states but no dwarf outbursts in their light curves which is still puzzling in the context of the disc instability model (DIM). The aim of this proposal is to detect the one physical characteristic which relates to both, the evolutionary status of VY Scl stars and the mechanism driving their low-states: the magnetic nature of the accreting white dwarf.
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